immunizing agent

English Thesaurus

1. any substance or organism that provokes an immune response (produces immunity) when introduced into the body (noun.artifact)

hypernym	:	antigen,
definition	:	any substance (as a toxin or enzyme) that stimulates an immune response in the body (especially the production of antibodies) (noun.substance)

hyponym	:	vaccine, vaccinum,
definition	:	immunogen consisting of a suspension of weakened or dead pathogenic cells injected in order to stimulate the production of antibodies (noun.artifact)

hyponym	:	toxin antitoxin,
definition	:	a mixture of toxin and antitoxin used to immunize against a disease (noun.substance)